The Personal Trade Copier duplicates orders between two instances of MT4 running on the same computer. The communication is almost instant. Lot sizing can be adjusted between the two accounts, and you can limit the copying to particular symbols or magic numbers.
The FX Blue Trading Simulator converts the MetaTrader 4 strategy tester into a tool for practising manual trading using historic data. You can use the Simulator to test how well you would have fared under particular historic market conditions - and/or to check how well your favourite indicators would have guided you in the past.